631581022734 has 16 divisors (see below), whose sum is σ = 1271207665488. Its totient is φ = 209186070912.

The previous prime is 631581022733. The next prime is 631581022757. The reversal of 631581022734 is 437220185136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631581022733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335233147 + ... + 335235030.

It is an arithmetic number, because the mean of its divisors is an integer number (79450479093).

Almost surely, 2^631581022734 is an apocalyptic number.

631581022734 is an abundant number, since it is smaller than the sum of its proper divisors (639626642754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631581022734 is a wasteful number, since it uses less digits than its factorization.

631581022734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670468339.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 631581022734 in words is "six hundred thirty-one billion, five hundred eighty-one million, twenty-two thousand, seven hundred thirty-four".